Door-closer.



G. C. RIXSO-N.

DOOR CLOSER.

APPLICATION FILED JUNE B, 1912.

17 '\\;I my. L 1

UNTTED sTATEs PATENT celeron.l

OSCAR C. RIXSON, OF NEV YORK, N. Y.

DOOR-CLOSER.

inerme Specification of Letters Patent,

Patented June 10, 1913.

Application led June 8, 1912. Serial No. 702544.

second street, New York city, New Yorin) have invented a new and useful Improvement in Door-Closers, whichI invention is fully set forth in the following specification. A

The object of the present invention is to provide for interior double-.acting doors a simple and compact n'iechanisin for closing the door and preventing slamming.

One of the features of the invention coinprises the novel manner of utilizing, for service with a double-acting door, a, snigle. spring (or closing-mechanism) and a single cylinder and piston (or checking-mechavnism).

Another object is to provide means whereby, when the door has been opened beyond a given distance (say ninety degrees), it will remain open.

Other features of the invention will be more speciically pointed out and claimed,

Mv invention will be best understood by reference to the annexed. specification and the accompanying drawings, that illustrate a preferred embodiment thereof.

In these drawingaHFignre 1 :is a vertical Section through the casing and mechanism constituting one form of my invention, being taken longitudinally through Fig. 2; Fig. :2 is a horizontal section of the same, taken longitudinally through Fig. l; Fig. 3 is a transverse section, taken through the left-hand end of Figs. 1 and 2.

1 represents a hollow casting having a screw-threaded opening at the top and a similar opening at one end; and 2 is a steel cylinder', screwed into the latter opening and inclosed at its outer end 3. The parts 1 and 2 constitute the casing for the mechanism.

4 is a screw-threaded disk having a central jouriial-bearing, and adapted to close the opening in the top of the casting 1. 5

the spindle or shaft, journaled in a bearing in. the floor of the casting and in the hearing in the disk 4, and carrying.T rigidly the transverse arms. G, each of which carries a depending roller, 'T and 8 respectively. The shaft protrndes above the journal-bearing in the disk, and a key 9 is seated transversely in the top thereof, 'to be engaged by C. Rixson, av

a slot in the arm or plate on the under edge of the door. In the cylinder 2 is located a piston-head. 10; and an interposed coiled spring 11 abuts against the rear of this' head and against the opposing face of casting 1 .respeetively.` A longitudinally-extended bar 12 is secured at one end tothe head 1t), and is slotted at the other end (to straddle the shaft), and at its rear is provided with a cross-head carrying rigid wings 13 and 14 l respectively, adapted to be engaged by the rollers 7 and 8 respectively. To economize space, the rear side of the shaft may be cut out, at 15 (adjacent the cross-head), to permit longer play to the bar 12. YWhen the door is opencd ccuntenclocLwise, withl respect to Fig. 2, as indicated by dotted line 9), one of the rollers, as 8, engages the ad- -iacent wing 1-1, forcing the latter' rearwardly, thus drawing the crossshead rearwardly, against the tension of the spring 11; and when the door is released, the tension of the spring forces the head and the bar for' ward, thus forcing the roller 8 back againstthe opposition of the piston, andfclosing the door.

The cross-head of the bar is cut away centrally, in such position and to such extent as not only to receive the cut-away portion of the shaft, but also to receive the adjacent roller when the door is opened (say) ninety degrees or more. In that case, the spring retracts the har slightly, and the roller is held in the dead center with respect to its pivot '(shaft 5) andthe spring 11; consequently the door will remain open, unt-il closed by hand past the ninety-degree posit-ion, whereupon the spriiig will close it, as before.

vThe piston 10 checks the return of the bar 12, but would not prevent the door itself from swinging shut, inasmuch as the latter is not positively secured to the checkingrnechanism. To prevent the door Swingingto aheadof the bar 1Q, a double pawl is pivoted on the latter, at 16, with one arm 17 not only rearwardly sageway 21 leading That is to say, duringthe return of the door to its closed posit-ion, the first-named roller 8 tends to force the adjacent arm 1S I but also out'waidly` but is opposed by the inst tlm-inner face this outward movement other roller T bearing aga of the oppTsite pa\\`larm 1T. the roller itself gradually moving out of the way; so that during said retnvnfmovement,- the double pawl (1T-l to its normal position wilh'its ltwo arms 17 and 18 symmetrically disposed in the tion indicated by full lines in Fig. 2. 'lhe piston l() is provided with the usual oneway valve 19, and the entire casing: is illed withoil, as is well understood. 2() is a tube passing freely through the pi.-ton 10 and abutting against the end 3 ol the cylinder. where it is beveled to give entrance to its bore; the piston 10 rides freely along this tube, which is secured to the casting 1, and beveled at. that end7 to `give access to a pasto the interior of the casting 1. screw 22 is turned down through the casting to regulate the ,size of this passageway. Along the side of the tube 20 .is a sloping eut-away, preferably so located as to provide ample room for the passage of the oil during the first part of the closing of the door (until the door reaches, say, within a foot or so of its vclosed position)7 whereupon the amount of eut-away will have. so diminished or disalnlwared as to produce the maximum retardation.

ln Fig. 1, the transverse key tl represented as protrudinjnr 'l'artber on one .side of the spindl v IS than on the. other side: ypreterably the shorter arm is en thel .side next to theadjaoe-nt door-facing'. lly havingr the door-plate corresjiuvndingl'v :.li'llted, even an ordinary Carpenter will rake no mistake in putting the door in proper position. 'it'lr out this precaution, one unfamiliar with such devices might assemble the. parts with the door one hundred and eighty degrees out. of the way.

I have thus described my invention with Considerable partieul'arity ol detail but only for the sake of clearness. Modifiea` tions of construction and of arrangement may be resorted to, parts may be transposed or inverted; and Some of the features used to the exclusion of others, without in any case departing from the spirit of my invention.

S) is jJ r:-uluall v restored t l l g it l i l lf l I.

AHaving thus described my invention, I' elaim:

1. A door-eloser and' check, comprising a spindle rotatably mounted in the floor beneath the doorandadapted to be rotated in veither direetion by the door, transverse arms 'earl-led by each pro\ided with a roller, a. slotted barA straddline .said spindle and having a crosshead provided with wings extending adjacent .said rollers. a. double-pand pivoted on said bar and having its arms extending adjaeent said rollers. a cylinder a piston connected to said bar, tendingY to foreesaid piston home.

3. door-closer and check, consisting of a spindle rotatable by the door and carrying transverse arms with bearing-surfaces. a cyl-` inder and piston, a spring .normally `forcing said piston to the closed end of SaideyIinder, a bar connected at one end to said piston and slotted at the other said spindle, a bar at the rear of said spindle and having a eountersunk Seat to receive either. oflsaid bearing-surfaces when the door is opened to a. predelermined extent, anda douhlopawl to be deflected by one plvoted on said bar et said.bearing-surfaces when the vdoor is opened so that one arm of saidpawl will oppose the other bearing-surface while the doer is closing. i

lv. ln a doorwloser. the combination of a easing seated beneath the lloor, olwratingureehanisln loeated therein. a spindle connected with said mechanism and protruding lrom said easing, and a. transverse-key through the upper end of said spindle, one of the arms of said key being longer than the other.

In testimony whereof I have signed this specification in the ing witnesses.

osoAR e. mason'.l lVitnesses C. A. L. Massimi; RALPH L; SCOTT.

end to straddle i eross-head carried by said presence of two subseribprovided with and a spring 

